Support tube for winding yarn on a bobbin

ABSTRACT

A support tube for winding yarn on a bobbin made of cardboard or another material suitable for the purpose and with a cylindrical or frustum of cone form. Such a tube is characterized in that it is equipped, on its side surface, with at least two indentations or attaching or capturing the end of the thread to be wound on the support itself.

[0001] The invention concerns a support tube for winding yarn on abobbin.

[0002] As is known, the manufacture of synthetic and artificial textilefibres can take place with different procedures but which all have incommon the extrusion step, with which, through a spinneret equipped withcapillary holes, the melted product, by coagulation or by cooling, istransformed into bands of elementary thread which constitute theso-called “filament” or yarn.

[0003] The yarn thus produced therefore needs to be wound onto asuitable support for forming the bobbin. Consisting of a tubular body,defined with the generic term “tube” and realized in cardboard or inanother material suitable for the purpose, which is equipped on its sidesurface with an indentation for attaching or intercepting the end of theyarn to be wound on the support itself and where both the interceptionof the yarn and it subsequent winding on the tubular body take placewith per se known automatic devices substantially resembling windingreels rotating on their own longitudinal axis, on which the tube to bewound is threaded.

[0004] Such a yarn-capturing indentation can take on differentconfigurations, according to the characteristics of the yarn to bewound, all of which however can be sorted into three types:

[0005] yarn-gathering cut: consists of a circumferential cut, in which,the section of the groove has at least one first angular portion with awider profile, which is used to capture the end of the yarn, and atleast one remaining portion with a thinner profile, which is used toblock the yarn itself, preventing sliding on the side surface and thusallowing its regular winding on the support.

[0006] simple notch, possibly equipped with a yarn-blocking slit:consists of an opening, which engages the entire thickness of thetubular support body and has a profile in which at least one obliqueportion is formed, specifically slightly inclined with respect to thedirection perpendicular to the longitudinal axis of the tubular body andhaving the function of easing the interception and attaching of the endof the yarn on the body itself. A slit can be associated with theoblique portion which engages the yarn and blocks it preventing it fromsliding on the side surface and therefore allowing its regular windingon the support.

[0007] window notch, possibly equipped with a yarn-blocking cut:consists of a simple notch formed completely inside the side surface ofthe tube and thus equipped with a closed perimeter with which is,possibly, associated a circumferential cut which has the task ofblocking the yarn, to allow its regular winding on the support.

[0008] At the current state of the art the yarn-gathering indentation,associated or not with a yarn-blocking indentation, is formed on theside surface of the tubular body and more precisely on one of the twoedges, or close to one of them, which defines one of the two ends of theside surface of the body itself.

[0009] Nevertheless this constructive solution allows the possibility ofattaching a single yarn to the tubular body and therefore it is possibleto realise the winding of a single hank of wound yarn for every singletube.

[0010] Moreover, with said constructive solution of the known type thetube, as well as, obviously, being able to be mounted on windingmachines on a single side, is suitable for being mounted only on awinding reel which has a specific direction of rotation, thatcorresponding to the inclination of the yarn-capturing indentationformed on the tube itself for which reason if winding machines are usedwith winding reels which rotate with opposite directions of rotation itis necessary to have scored two different types of “tubes”, to the greatdisadvantage of the productivity.

[0011] The object of the present invention is to provide a tube forwinding yarn which can be mounted on winding reels, independently fromtheir direction of rotation.

[0012] A further object of the invention is to provide a tube forwinding yarn which can be threaded on a winding reel on both its sides.

[0013] A further, but no less important object of the invention is toprovide a tube for winding yarn which allows at least two packages orhanks to be realized on a single support consisting of the tube itself.

[0014] A further object of the invention is to provide a tube forwinding yarn which ensures a greater productivity (increase in theamount of yarn wound per hour worked) with respect to suchlike knownproducts.

[0015] These objects are obtained through the realization of a tubeequipped with at least two indentations, formed on its side surface.

[0016] A first possible embodiment involves forming two indentations onthe side surface of the tube, a first indentation being formed near toor directly on one of the two outer edges of the surface itself and asecond indentation being formed still on the same side surface but in anintermediate position between the two aforementioned edges, thus makingthe simultaneous winding of two hanks on a single support possible.

[0017] In the same way, with three indentations, one formed on the edgesand the others on the side surface and separated from each other by athird of the height of said surface, it is possible to simultaneouslywind three hanks on a single support.

[0018] A second possible embodiment involves forming two indentations onthe side surface of the tube, each arranged on one of the two outeredges of the surface itself. In such a way the winding of a single hankon a single support can be realized but there is the advantage that thetube can be mounted on the winding reel on either of the two sides.

[0019] The invention also provides that the indentations have a profilewhich is preferably symmetrical with respect to the longitudinal axis ofthe tube, so as to allow the attaching of the yarn independently of thedirection of rotation of the tube itself.

[0020] Finally, the invention provides that the indentations have apreferably symmetrical profile with respect to a midpoint planeperpendicular to the longitudinal axis, allowing the tube to be slottedonto the support winding reel, on one or the other side of the tubeitself.

[0021] The invention will be better illustrated through the descriptionof some of its possible embodiments, given only as a non-limitingillustrative example, with the help of the attached drawings, in which:

[0022]FIG. 1 represents a perspective view of a tube according to theinvention, equipped with indentations with different profiles, forattaching the yarn;

[0023]FIG. 2 represents a tube according to the invention equipped withtwo indentations;

[0024]FIG. 3 represents a tube according to FIG. 2 with two wound hanks;

[0025]FIG. 4 represents a tube according to the invention equipped withtwo opposite indentations formed on the outer edges for winding a hank;

[0026]FIG. 5 represents a tube according to the invention with threewound hanks;

[0027]FIG. 6 represents a tube according to the invention equipped withindentations with a symmetrical profile.

[0028] As can be seen in FIG. 1, the tube for winding yarn on a bobbinconsists of a tubular, cylindrical or frustum of cone body 1, upon theside surface 2 of which indentations 3 are formed in which the end ofthe wound yarn attaches.

[0029] The indentation 3.1, of the yarn-catching type, consists of acircumferential cut in which an angular portion 3.11 has a greater widthand depth with respect to the remaining angular portion 3.12.

[0030] The indentation 3.2, of the simple notch type, consists of athrough-opening equipped with an oblique portion 3.21, to realize theattachment of the yarn and with a slit 3.22 for stopping the yarnitself.

[0031] The indentation 3.3, of the window notch type, consists of athrough-opening 3.31, for attaching the yarn, possibly associated with acircumferential cut 3.32, for locking the yarn itself.

[0032] In FIGS. 2 and 3 the tube according to the invention isrepresented in which the single tubular body 1 is equipped with twoindentations, a first sample notch indentation 3.2 formed on the outeredge 4, and a second window notch indentation 3.3 arranged in anintermediate position on the side surface 2, respectively, so as toallow the winding of the two hanks 5 on the same body.

[0033] In FIG. 4 the tube according to the invention is representedwhich has two indentations 6.1 and 6.2 formed on the edges, beingarranged opposite one another and with symmetrical profiles, so as toallow the winding of the bobbin 7 on both sides of the tube itself.

[0034] In FIG. 5 a tube is represented with three wound bobbins 8.

[0035] In FIG. 6 on the tube three indentations are formed: twoindentations 8.1 and 8.2 on the edges and one intermediate indentation 9on the side surface which have a symmetrical profile with respect to adiametric plane passing through the axis “Z” of the tube, theintermediate indentation also having a symmetrical profile with respectto the plane “α”, passing through the midpoint line “K” of saidindentation and perpendicular to the axis “Z” or the tube itself.

[0036] Obviously, different embodiments to those illustrated are alsopossible, such as different forms of indentation, as well as a differentcombination thereof on a single body or on a single circumferentialarrangement without for this reason leaving the scope of the followingclaims.

1. SUPPORT TUBE FOR WINDING YARN ONTO A BOBBIN made of cardboard or ofanother material suitable for the purpose and having a cylindrical orfrustum of cone shape, said tube characterized in that it is equipped,on its side surface, with at least two indentations for attaching andintercepting the end of the yarn to be wound on the support itself. 2.SUPPORT TUBE FOR WINDING YARN ONTO A BOBBIN according to claim 1,characterized in that the indentations allow the attachment of at leasttwo yarns and the winding and formation of at least two hanks on thesame support.
 3. SUPPORT TUBE FOR WINDING YARN ONTO A BOBBIN accordingto claim 2, characterized in that a first indentation is formed near toor directly on one of the two outer edges of the side surface of thetubular body, whereas at least one other indentation is formed still anthe same side surface, but in an intermediate position between the twoaforementioned edges.
 4. SUPPORT TUBE FOR WINDING YARN ONTO A BOBBINaccording to claim 2, characterized in that the two indentations wormedon the side surface of the tube are each arranged on one of the twoouter edges of the same surface.
 5. SUPPORT TUBE FOR WINDING YARN ONTO ABOBBIN according to claim 4, characterized in that the two indentationshave a mutually symmetrical profile.
 6. SUPPORT TUBE FOR WINDING YARNONTO A BOBBIN according to claim 1, characterized in that theindentations have a symmetrical profile with respect to the longitudinalaxis of the tube, to allow the attaching of the yarn independently ofthe direction of rotation of the tube itself.
 7. SUPPORT TUBE FORWINDING YARN ONTO A BOBBIN according to claim 1, characterized in thatthe indentations have a symmetrical profile with respect to a midpointplane perpendicular to the longitudinal axis of the tube itself, toallow the tube to be slotted onto the support winding reel, irrespectiveof whether the tube itself goes is one direction or the oppositedirection.
 8. SUPPORT TUBE FOR WINDING YARN ONTO A BOBBIN according toclaim 1, characterized in that the indentations are of different typesand sizes, such as thread-gathering cuts, simple notches, possiblyequipped with a yarn-locking slit, and a window notch, possibly equippedwith a yarn-catching and yarn-capturing cut.
 9. SUPPORT TUBE FOR WINDINGYARN ONTO A BOBBIN according to claim 1, characterized in that itforesees a plurality of indentations formed on the single tubular bodyand they are all of the same type and/or of different types and withdifferent notch/cut combinations.
 10. SUPPORT TUBE FOR WINDING YARN ONTOA BOBBIN according to claim 2, consisting of a tubular body (1)characterized in that on its side surface (2) two indentations (3) areformed, in which the two ends of the two wound threads attach, one ofsaid two indentations being of the simple notch (3.2) type, formed onthe outer edge (4) and the other being of the window notch (3.3) type,arranged in an intermediate position on the side surface (2) so as toallow the winding of the two hanks (5) on the same body.
 11. SUPPORTTUBE FOR WINDING YARN ONTO A BOBBIN according to claim 1, consisting ofa tubular body (1) characterized in that two indentations (6.1, 6.2) areformed on the edges (4), are arranged opposite each other and havemutually symmetrical profiles, so as to allow the winding of the quill(7) on both sides of the tube itself.
 12. SUPPORT TUBE FOR WINDING YARNONTO A BOBBIN according to claim 1, consisting of a tubular body (1)characterized in that it has three indentations, two indentations (8.1,8.2) on the edges (4) and one intermediate indentation (9) on the sidesurface, said indentations having a preferably symmetrical profile withrespect to a diametric plane passing through the axis (Z) of the tube.13. SUPPORT TUBE FOR WINDING YARN ONTO A BOBBIN according to claim 12,consisting of a tubular body (1) characterized in that the intermediateindentation (9) on the side surface has a symmetrical profile withrespect to the plane “α”, passing through the midpoint line (K) of saidindentation and perpendicular to the axis (Z) of the tube itself.